Method and apparatus of combined inter and intra prediction with different chroma formats for video coding

2. The method of claim 1, wherein the additional hypothesis of prediction is Intra prediction and the Intra prediction for said one or more chroma blocks is disabled if the width of said one or more chroma blocks is smaller than the threshold equal to 4.

3. The method of claim 1, wherein the multi-hypothesis prediction mode corresponds to Combined Inter/Intra Prediction (CIIP) mode.

4. The method of claim 1, wherein the multi-hypothesis prediction mode corresponds to Triangular Prediction mode (TPM).

5. The method of claim 1, wherein the multi-hypothesis prediction mode corresponds to Geometric Merge mode (GEO).

6. The method of claim 1, wherein the current block is in chroma format 4:4:4, 4:2:2 or 4:2:0.

7. The method of claim 1, wherein the threshold is signalled at a Transform Unit (TU) or Transform Block (TB), Coding Unit (CU) or Coding Block (CB), Coding Tree Unit (CTU) or Coding Tree Block (CTB), slice, tile, tile group, Sequence Parameter Set (SPS), Picture Parameter Set (PPS), or picture level of a video bitstream.

8. The method of claim 1, wherein the image area corresponds to a Coding Tree Unit (CTU).

11. The method of claim 10, wherein the additional hypothesis of prediction is Intra prediction and the Intra prediction for said one or more chroma blocks is disabled if the width of said one or more chroma blocks is smaller than the threshold equal to 4.

12. The method of claim 10, wherein the multi-hypothesis prediction mode corresponds to Combined Inter/Intra Prediction (CIIP) mode.

13. The method of claim 10, wherein the multi-hypothesis prediction mode corresponds to Triangular Prediction mode (TPM).

14. The method of claim 10, wherein the multi-hypothesis prediction mode corresponds to Geometric Merge mode (GEO).

15. The method of claim 10, wherein the current block is in chroma format 4:4:4, 4:2:2 or 4:2:0.

16. The method of claim 10, wherein the threshold is parsed at a Transform Unit (TU) or Transform Block (TB), Coding Unit (CU) or Coding Block (CB), Coding Tree Unit (CTU) or Coding Tree Block (CTB), slice, tile, tile group, Sequence Parameter Set (SPS), Picture Parameter Set (PPS), or picture level of a video bitstream.

17. The method of claim 10, wherein the image area corresponds to a Coding Tree Unit (CTU).